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Master Lock 6621 Pro Series Key-in-Knob Padlock - Weather Tough

  • 6621 NR LJ CN D12 KAMK LZ3

    6621 NR LJ CN D12 KAMK LZ3

    $40.11 40% Off

    Function
    Non-Removable Key
    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Cylinder Type
    Kwikset
    Number of Pins
    Not Included
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    Not Included
    More Details

  • 6621 NR LJ CN D045 KA 3KEY

    6621 NR LJ CN D045 KA 3KEY

    $35.46 40% Off

    Function
    Non-Removable Key
    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Cylinder Type
    Schlage C
    Number of Pins
    5 Pins
    Keying
    Keyed Alike
    Custom Marking
    Not Included
    Number of Key
    3 keys per lock
    More Details

  • 6621 CN D03 KAMK LZ2

    6621 CN D03 KAMK LZ2

    $37.21 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    1-1/8" Boron
    Chain
    Sash Chain
    Cylinder Type
    Yale 8
    Number of Pins
    Not Included
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    Not Included
    More Details

  • 6621 NR LJ CN WCS5 KAMK 1KEY

    6621 NR LJ CN WCS5 KAMK 1KEY

    $27.38 40% Off

    Function
    Non-Removable Key
    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Cylinder Type
    Lock Body Only
    Number of Pins
    5 Pins
    Custom Marking
    Not Included
    Number of Key
    1 key per lock
    More Details

  • 6621 NR LJ CN D125 KAMK LZ3 NOKEY

    6621 NR LJ CN D125 KAMK LZ3 NOKEY

    $40.11 40% Off

    Function
    Non-Removable Key
    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Cylinder Type
    Kwikset
    Number of Pins
    5 Pins
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    0 keys per lock
    More Details

  • 6621 NR CN WCS KAMK LZ4 NOKEY

    6621 NR CN WCS KAMK LZ4 NOKEY

    $31.13 40% Off

    Function
    Non-Removable Key
    Shackle Length
    1-1/8" Boron
    Chain
    Sash Chain
    Cylinder Type
    Lock Body Only
    Number of Pins
    Not Included
    Custom Marking
    Laser engraved in 4 areas
    Number of Key
    0 keys per lock
    More Details

  • 6621 NR LJ CN D03 LZ2

    6621 NR LJ CN D03 LZ2

    $36.05 40% Off

    Function
    Non-Removable Key
    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Cylinder Type
    Yale 8
    Number of Pins
    Not Included
    Keying
    Not Included
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    Not Included
    More Details

  • 6621 NR CN WCS6 KD LZ1 NOKEY

    6621 NR CN WCS6 KD LZ1 NOKEY

    $25.46 40% Off

    Function
    Non-Removable Key
    Shackle Length
    1-1/8" Boron
    Chain
    Sash Chain
    Cylinder Type
    Lock Body Only
    Number of Pins
    6 Pins
    Keying
    Keyed Different
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    0 keys per lock
    More Details

  • 6621 CN D036 KAMK LZ2 1KEY

    6621 CN D036 KAMK LZ2 1KEY

    $38.26 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    1-1/8" Boron
    Chain
    Sash Chain
    Cylinder Type
    Yale 8
    Number of Pins
    6 Pins
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    1 key per lock
    More Details

  • 6621 LJ D035 KA LZ1 1KEY

    6621 LJ D035 KA LZ1 1KEY

    $32.88 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    2-1/2" Boron
    Chain
    Not Included
    Cylinder Type
    Yale 8
    Number of Pins
    5 Pins
    Keying
    Keyed Alike
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    1 key per lock
    More Details

  • 6621 NR LJ CN D036 KAMK LZ1 3KEY

    6621 NR LJ CN D036 KAMK LZ1 3KEY

    $39.73 40% Off

    Function
    Non-Removable Key
    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Cylinder Type
    Yale 8
    Number of Pins
    6 Pins
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    3 keys per lock
    More Details

  • 6621 NR LJ CN D036 KAMK LZ4 NOKEY

    6621 NR LJ CN D036 KAMK LZ4 NOKEY

    $42.48 40% Off

    Function
    Non-Removable Key
    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Cylinder Type
    Yale 8
    Number of Pins
    6 Pins
    Custom Marking
    Laser engraved in 4 areas
    Number of Key
    0 keys per lock
    More Details

  • 6621 LJ WCS LZ1 4KEY

    6621 LJ WCS LZ1 4KEY

    $25.78 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    2-1/2" Boron
    Chain
    Not Included
    Cylinder Type
    Lock Body Only
    Number of Pins
    Not Included
    Keying
    Not Included
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    4 keys per lock
    More Details

  • 6621 NR LF D046 KA LZ4 NOKEY

    6621 NR LF D046 KA LZ4 NOKEY

    $37.80 40% Off

    Function
    Non-Removable Key
    Shackle Length
    1-1/2" Boron
    Chain
    Not Included
    Cylinder Type
    Schlage C
    Number of Pins
    6 Pins
    Keying
    Keyed Alike
    Custom Marking
    Laser engraved in 4 areas
    Number of Key
    0 keys per lock
    More Details

  • 6621 NR LJ CN WCS5 KA LZ3 NOKEY

    6621 NR LJ CN WCS5 KA LZ3 NOKEY

    $29.49 40% Off

    Function
    Non-Removable Key
    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Cylinder Type
    Lock Body Only
    Number of Pins
    5 Pins
    Keying
    Keyed Alike
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    0 keys per lock
    More Details

  • 6621 NR LJ CN WCS6 KD LZ4 1KEY

    6621 NR LJ CN WCS6 KD LZ4 1KEY

    $31.02 40% Off

    Function
    Non-Removable Key
    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Cylinder Type
    Lock Body Only
    Number of Pins
    6 Pins
    Keying
    Keyed Different
    Custom Marking
    Laser engraved in 4 areas
    Number of Key
    1 key per lock
    More Details

  • 6621 WCS6

    6621 WCS6

    $21.46 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    1-1/8" Boron
    Chain
    Not Included
    Cylinder Type
    Lock Body Only
    Number of Pins
    6 Pins
    Keying
    Not Included
    Custom Marking
    Not Included
    Number of Key
    Not Included
    More Details

  • 6621 CN WCS6 KAMK LZ3

    6621 CN WCS6 KAMK LZ3

    $30.86 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    1-1/8" Boron
    Chain
    Sash Chain
    Cylinder Type
    Lock Body Only
    Number of Pins
    6 Pins
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    Not Included
    More Details

  • 6621 LJ WCS6 MK LZ2

    6621 LJ WCS6 MK LZ2

    $27.59 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    2-1/2" Boron
    Chain
    Not Included
    Cylinder Type
    Lock Body Only
    Number of Pins
    6 Pins
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    Not Included
    More Details

  • 6621 NR LF D03 KA LZ3 3KEY

    6621 NR LF D03 KA LZ3 3KEY

    $36.67 40% Off

    Function
    Non-Removable Key
    Shackle Length
    1-1/2" Boron
    Chain
    Not Included
    Cylinder Type
    Yale 8
    Number of Pins
    Not Included
    Keying
    Keyed Alike
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    3 keys per lock
    More Details

  • 6621 LF D045 LZ4 3KEY

    6621 LF D045 LZ4 3KEY

    $37.15 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    1-1/2" Boron
    Chain
    Not Included
    Cylinder Type
    Schlage C
    Number of Pins
    5 Pins
    Keying
    Not Included
    Custom Marking
    Laser engraved in 4 areas
    Number of Key
    3 keys per lock
    More Details

  • 6621 NR LF D036 MK LZ2 4KEY

    6621 NR LF D036 MK LZ2 4KEY

    $38.67 40% Off

    Function
    Non-Removable Key
    Shackle Length
    1-1/2" Boron
    Chain
    Not Included
    Cylinder Type
    Yale 8
    Number of Pins
    6 Pins
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    4 keys per lock
    More Details

  • 6621 LF D046 KAMK LZ1

    6621 LF D046 KAMK LZ1

    $35.70 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    1-1/2" Boron
    Chain
    Not Included
    Cylinder Type
    Schlage C
    Number of Pins
    6 Pins
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    Not Included
    More Details

  • 6621 LF D12 MK LZ1 1KEY

    6621 LF D12 MK LZ1 1KEY

    $33.81 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    1-1/2" Boron
    Chain
    Not Included
    Cylinder Type
    Kwikset
    Number of Pins
    Not Included
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    1 key per lock
    More Details

  • 6621 NR LF WCS5 KD LZ4 NOKEY

    6621 NR LF WCS5 KD LZ4 NOKEY

    $27.18 40% Off

    Function
    Non-Removable Key
    Shackle Length
    1-1/2" Boron
    Chain
    Not Included
    Cylinder Type
    Lock Body Only
    Number of Pins
    5 Pins
    Keying
    Keyed Different
    Custom Marking
    Laser engraved in 4 areas
    Number of Key
    0 keys per lock
    More Details

  • 6621 LJ CN D125 KA LZ2

    6621 LJ CN D125 KA LZ2

    $36.89 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Cylinder Type
    Kwikset
    Number of Pins
    5 Pins
    Keying
    Keyed Alike
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    Not Included
    More Details

  • 6621 LF D03 LZ2 3KEY

    6621 LF D03 LZ2 3KEY

    $34.50 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    1-1/2" Boron
    Chain
    Not Included
    Cylinder Type
    Yale 8
    Number of Pins
    Not Included
    Keying
    Not Included
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    3 keys per lock
    More Details

  • 6621 NR LF CN D04 KAMK LZ3 3KEY

    6621 NR LF CN D04 KAMK LZ3 3KEY

    $41.23 40% Off

    Function
    Non-Removable Key
    Shackle Length
    1-1/2" Boron
    Chain
    Sash Chain
    Cylinder Type
    Schlage C
    Number of Pins
    Not Included
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    3 keys per lock
    More Details

  • 6621 LJ CN D035 KAMK LZ1 3KEY

    6621 LJ CN D035 KAMK LZ1 3KEY

    $38.68 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Cylinder Type
    Yale 8
    Number of Pins
    5 Pins
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    3 keys per lock
    More Details

  • 6621 LF D036 LZ1 3KEY

    6621 LF D036 LZ1 3KEY

    $34.21 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    1-1/2" Boron
    Chain
    Not Included
    Cylinder Type
    Yale 8
    Number of Pins
    6 Pins
    Keying
    Not Included
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    3 keys per lock
    More Details

  • 6621 LJ CN WCS6 KAMK LZ1

    6621 LJ CN WCS6 KAMK LZ1

    $29.76 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Cylinder Type
    Lock Body Only
    Number of Pins
    6 Pins
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    Not Included
    More Details

  • 6621 NR LF CN D036 MK LZ1 NOKEY

    6621 NR LF CN D036 MK LZ1 NOKEY

    $37.53 40% Off

    Function
    Non-Removable Key
    Shackle Length
    1-1/2" Boron
    Chain
    Sash Chain
    Cylinder Type
    Yale 8
    Number of Pins
    6 Pins
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    0 keys per lock
    More Details

  • 6621 D04 KA LZ2 1KEY

    6621 D04 KA LZ2 1KEY

    $32.65 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    1-1/8" Boron
    Chain
    Not Included
    Cylinder Type
    Schlage C
    Number of Pins
    Not Included
    Keying
    Keyed Alike
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    1 key per lock
    More Details

  • 6621 NR LF CN WCS5 LZ3

    6621 NR LF CN WCS5 LZ3

    $28.53 40% Off

    Function
    Non-Removable Key
    Shackle Length
    1-1/2" Boron
    Chain
    Sash Chain
    Cylinder Type
    Lock Body Only
    Number of Pins
    5 Pins
    Keying
    Not Included
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    Not Included
    More Details

  • 6621 NR LF CN WCS6 LZ3

    6621 NR LF CN WCS6 LZ3

    $29.58 40% Off

    Function
    Non-Removable Key
    Shackle Length
    1-1/2" Boron
    Chain
    Sash Chain
    Cylinder Type
    Lock Body Only
    Number of Pins
    6 Pins
    Keying
    Not Included
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    Not Included
    More Details

  • 6621 NR LF CN WCS6 KD LZ3

    6621 NR LF CN WCS6 KD LZ3

    $29.58 40% Off

    Function
    Non-Removable Key
    Shackle Length
    1-1/2" Boron
    Chain
    Sash Chain
    Cylinder Type
    Lock Body Only
    Number of Pins
    6 Pins
    Keying
    Keyed Different
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    Not Included
    More Details

  • 6621 D03 KD LZ1 3KEY

    6621 D03 KD LZ1 3KEY

    $31.71 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    1-1/8" Boron
    Chain
    Not Included
    Cylinder Type
    Yale 8
    Number of Pins
    Not Included
    Keying
    Keyed Different
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    3 keys per lock
    More Details

  • 6621 LF CN D045 KAMK LZ4 4KEY

    6621 LF CN D045 KAMK LZ4 4KEY

    $43.78 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    1-1/2" Boron
    Chain
    Sash Chain
    Cylinder Type
    Schlage C
    Number of Pins
    5 Pins
    Custom Marking
    Laser engraved in 4 areas
    Number of Key
    4 keys per lock
    More Details

  • 6621 NR D03 KA LZ2 3KEY

    6621 NR D03 KA LZ2 3KEY

    $33.89 40% Off

    Function
    Non-Removable Key
    Shackle Length
    1-1/8" Boron
    Chain
    Not Included
    Cylinder Type
    Yale 8
    Number of Pins
    Not Included
    Keying
    Keyed Alike
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    3 keys per lock
    More Details

  • 6621 NR D035 KD LZ1 4KEY

    6621 NR D035 KD LZ1 4KEY

    $32.94 40% Off

    Function
    Non-Removable Key
    Shackle Length
    1-1/8" Boron
    Chain
    Not Included
    Cylinder Type
    Yale 8
    Number of Pins
    5 Pins
    Keying
    Keyed Different
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    4 keys per lock
    More Details

  • 6621 D035 KAMK LZ2 4KEY

    6621 D035 KAMK LZ2 4KEY

    $37.01 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    1-1/8" Boron
    Chain
    Not Included
    Cylinder Type
    Yale 8
    Number of Pins
    5 Pins
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    4 keys per lock
    More Details

  • 6621 D036 LZ4 NOKEY

    6621 D036 LZ4 NOKEY

    $35.51 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    1-1/8" Boron
    Chain
    Not Included
    Cylinder Type
    Yale 8
    Number of Pins
    6 Pins
    Keying
    Not Included
    Custom Marking
    Laser engraved in 4 areas
    Number of Key
    0 keys per lock
    More Details

  • 6621 NR D036 KA LZ3 NOKEY

    6621 NR D036 KA LZ3 NOKEY

    $35.03 40% Off

    Function
    Non-Removable Key
    Shackle Length
    1-1/8" Boron
    Chain
    Not Included
    Cylinder Type
    Yale 8
    Number of Pins
    6 Pins
    Keying
    Keyed Alike
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    0 keys per lock
    More Details

  • 6621 LF CN D125 KD LZ2 1KEY

    6621 LF CN D125 KD LZ2 1KEY

    $35.93 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    1-1/2" Boron
    Chain
    Sash Chain
    Cylinder Type
    Kwikset
    Number of Pins
    5 Pins
    Keying
    Keyed Different
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    1 key per lock
    More Details

  • 6621 CN D036 MK 4KEY

    6621 CN D036 MK 4KEY

    $37.22 40% Off

    Function
    Non-Key Retaining
    Shackle Length
    1-1/8" Boron
    Chain
    Sash Chain
    Cylinder Type
    Yale 8
    Number of Pins
    6 Pins
    Custom Marking
    Not Included
    Number of Key
    4 keys per lock
    More Details

  • 6621 NR LJ D03 KA LZ1 4KEY

    6621 NR LJ D03 KA LZ1 4KEY

    $35.35 40% Off

    Function
    Non-Removable Key
    Shackle Length
    2-1/2" Boron
    Chain
    Not Included
    Cylinder Type
    Yale 8
    Number of Pins
    Not Included
    Keying
    Keyed Alike
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    4 keys per lock
    More Details

  • 6621 NR LJ D036 LZ2 1KEY

    6621 NR LJ D036 LZ2 1KEY

    $34.43 40% Off

    Function
    Non-Removable Key
    Shackle Length
    2-1/2" Boron
    Chain
    Not Included
    Cylinder Type
    Yale 8
    Number of Pins
    6 Pins
    Keying
    Not Included
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    1 key per lock
    More Details

  • 6621 NR WCS6 KAMK LZ3 NOKEY

    6621 NR WCS6 KAMK LZ3 NOKEY

    $28.19 40% Off

    Function
    Non-Removable Key
    Shackle Length
    1-1/8" Boron
    Chain
    Not Included
    Cylinder Type
    Lock Body Only
    Number of Pins
    6 Pins
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    0 keys per lock
    More Details

  • 6621 NR LJ D036 KAMK LZ2

    6621 NR LJ D036 KAMK LZ2

    $37.16 40% Off

    Function
    Non-Removable Key
    Shackle Length
    2-1/2" Boron
    Chain
    Not Included
    Cylinder Type
    Yale 8
    Number of Pins
    6 Pins
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    Not Included
    More Details

  • 6621 NR CN D046 KD LZ4

    6621 NR CN D046 KD LZ4

    $38.18 40% Off

    Function
    Non-Removable Key
    Shackle Length
    1-1/8" Boron
    Chain
    Sash Chain
    Cylinder Type
    Schlage C
    Number of Pins
    6 Pins
    Keying
    Keyed Different
    Custom Marking
    Laser engraved in 4 areas
    Number of Key
    Not Included
    More Details
Showing 2801 - 2850 of 16515 items

All orders must be in increments of 6

Product Features:

  • Choice of 22 Key-in-Knob keyways to match this padlock to your security door locks. See Related Information for options.
  • Ideal for harsh outdoor conditions - exclusive Weather Tough® cover protects lock from water, ice, dirt and grime
  • ProSeries® Padlocks are designed for Commercial/Industrial applications
  • 2-1/8" (54mm) heavy steel body withstands physical attack
  • 1-1/8" (29mm) tall, 5/16" (8mm) diameter hardened boron alloy shackle for superior cut resistance
  • Horizontal Clearance: 7/8" (22mm)
  • Dual ball locking mechanism resists pulling and prying
  • Lock available with or without cylinder to key at your facility. Accepts Lori® #1539 style cylinder.
  • Rekeyable 5- and 6-pin cylinder options.

Best Used For:

  • Truck Doors
  • Trailers, Vans & Moving Trucks
  • Manufacturing Environments
  • Industrial, Storefront & Business Gates